 |
| Titel |
Effects of climate model radiation, humidity and wind estimates on hydrological simulations |
| VerfasserIn |
I. Haddeland, J. Heinke, F. Voß, S. Eisner, C. Chen, S. Hagemann, F. Ludwig |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1027-5606
|
| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 16, no. 2 ; Nr. 16, no. 2 (2012-02-02), S.305-318 |
| Datensatznummer |
250013165
|
| Publikation (Nr.) |
 copernicus.org/hess-16-305-2012.pdf |
|
|
|
|
|
| Zusammenfassung |
| Due to biases in the output of climate models, a bias correction is often
needed to make the output suitable for use in hydrological simulations. In
most cases only the temperature and precipitation values are bias corrected.
However, often there are also biases in other variables such as radiation,
humidity and wind speed. In this study we tested to what extent it is also
needed to bias correct these variables. Responses to radiation, humidity and
wind estimates from two climate models for four large-scale hydrological
models are analysed. For the period 1971–2000 these hydrological simulations
are compared to simulations using meteorological data based on observations
and reanalysis; i.e. the baseline simulation. In both forcing datasets
originating from climate models precipitation and temperature are bias
corrected to the baseline forcing dataset. Hence, it is only effects of
radiation, humidity and wind estimates that are tested here. The direct use
of climate model outputs result in substantial different evapotranspiration
and runoff estimates, when compared to the baseline simulations. A simple
bias correction method is implemented and tested by rerunning the
hydrological models using bias corrected radiation, humidity and wind
values. The results indicate that bias correction can successfully be used
to match the baseline simulations. Finally, historical (1971–2000) and
future (2071–2100) model simulations resulting from using bias corrected
forcings are compared to the results using non-bias corrected forcings. The
relative changes in simulated evapotranspiration and runoff are relatively
similar for the bias corrected and non bias corrected hydrological
projections, although the absolute evapotranspiration and runoff numbers are
often very different. The simulated relative and absolute differences when
using bias corrected and non bias corrected climate model radiation,
humidity and wind values are, however, smaller than literature reported
differences resulting from using bias corrected and non bias corrected
climate model precipitation and temperature values. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|